EQAtlas Map of Upper Guk Room 17
Invis should be fine .. and possible that if your Pal hasn't ever killed anything on the live Froglok faction, that you won't be kos, even without invis.
Lots of ways to get to LGuk as the map shows. I prefer #7 on the map, as it's very close to the dead side, with only a few live frogs in the way, and is the easy path to IVU to the safe spot in LGuk.
Yther Ore.